JP2006001600A - Plastic cap with temper-resistant function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure sufficient frictional force between the peripheral face of a cap and the fingers by overcoming the problem that uncapping a container is difficult because the fingers slip on the peripheral face of the cap even if a band width is set wider than a predetermined value for assuring the minimum or even if each knurl scored in the peripheral face of the cap is set narrow, when the container is uncapped by rotating the cap screwed on the container discharging opening to close it, thereby tearing the ringlike band or when the container is uncapped by cutting it off along a half-cut section. <P>SOLUTION: A plurality of linear projections 2c projecting in a bus direction are formed on the periphery of the cylindrical part 2 of the cap A, on which knurls 2b or no knurls 2b are scored. Alternatively, a plurality of linear projections 2c projecting in the bus line are formed on the periphery of the cylindrical part 2 of the cap A, on which knurls 2b or no knurls 2b are scored, while a plurality of linear projections 4c projecting in the bus line are formed on the periphery of the ringlike band section. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is for attaching as a spout for liquid packaging containers such as various plastic containers, including liquid packaging paper containers such as paper packs for filling and packaging beverages such as milk and juice, liquid foods, or liquid non-foods. The present invention relates to a plastic cap with a tamper resistant function.

  In general, as shown in FIG. 5A, a plastic spigot with a tamper-evident prevention function has a pull-open type pull ring provided with a cap A and an opening pull ring 18 that is covered and sealed by the cap A. It consists of a container spout B or a container spout B without pull ring (not shown). The cap A and the container spout B have a predetermined opening prevention structure, and the cap A is connected to the spout B. Can be screwed and sealed, and when Cap A is opened, the structure cannot be restored to the original closed state again, giving the container unopened properties (virginity) Has been used to.

  In general, as the cap A of the above-mentioned plastic stopper with an unauthorized opening prevention function, for example, as shown in a side sectional view of FIG. The cylindrical portion 2 engraved, the screw portion 2a provided on the inner circumference of the cylindrical portion 2, and the lower end portion of the cylindrical portion 2 are connected in a ring shape via a half-cut wire 3 provided as necessary. A thin plate-like ring-shaped band part 4 provided, and a notch part 6 as an easily breakable part for easily breaking the ring-shaped band part 4 provided in a part of the ring-shaped band part 4 in the generatrix direction, From the substantially horizontal direction to the upright direction toward the ring center inward shown in the LL plane sectional view of FIG. Various forms of tamper-evident prevention machines provided with a plurality of locking plates 5 extending in a foldable manner There is a plastic cap A attached.

  By the way, as shown in the side sectional view of FIG. 5 (a), the plastic cap A with an unauthorized opening preventing function as described above is formed by replacing the screw portion 2a of the cap cylindrical portion 2 with the spout B of the plastic bottle or paper. The ring-shaped band portion 4 is fitted into the convex portion 14 provided in a ring shape on the outer periphery of the spout portion B while being screwed to the screw portion 13a provided on the outer periphery of the cylindrical portion 13 of the spout portion B attached to the container. In this case, a plurality of horizontal locking plates 5 extending on the inner periphery of the lower end of the ring-shaped band portion 4 shown in the plan view of FIG. The outer periphery of the spout portion B is fitted over the convex portion 14 provided in a ring shape, and is bent in the standing direction through the bent portion 5a. The distal end portion 5b of the locking plate 5 is projected to the convex portion of the spout portion B. The cap A is engaged with the lower part of the portion 14 from the container outlet B. Adapted to be mounted is locked stoppered to prevent. In the case of the spout B attached to the paper container, a flange plate 19 is provided on the outer periphery of the base 11 at the lower end of the cylindrical portion 13 (the base 11 having an outer periphery substantially the same diameter as the outer periphery of the cap A). The stopper is attached to the outer surface of the upper surface plate 22 in alignment with the plug attachment hole 22a formed in the upper surface plate 22 of the liquid packaging paper container 20 through the flange plate 19, or as shown in FIG. The plug is inserted and attached from the inner surface side of the upper surface plate 22 into the plug attachment hole 22a formed in the upper surface plate 22 of the liquid packaging paper container 20 through the flange plate 19.

  Then, when the cylindrical portion 2 of the cap A screwed and applied to the container outlet portion B shown in FIG. 5A is rotated in the opening direction, both the cylindrical portion 2 and the ring-shaped band portion 4 are injected into the container. The locking plate 5 of the band portion 4 that gradually turns in the upper end direction of the outlet portion B and engages with the lower portion of the convex portion 14 on the outer periphery of the cylindrical portion 13 of the outlet portion B of the container has a band portion The stress in the horizontal posture direction that expands the diameter of 4 is applied, and the notched portion 6 of the band portion 4 is also subjected to the tension due to the expansion. Can detect tampering.

  Further, as shown in FIG. 6A, the spout portion B provided with a cap A of a plastic stopper with a tamper-evident prevention function by screwing and covering the spout portion B provided in a ring shape on the outer periphery thereof. In some cases, a plurality of convex portions 15 are provided on the outer periphery of the lower portion so that concave portions into which the number of the locking plates 5 are fitted are formed corresponding to the number of the locking plates 5. When the cylindrical part 2 of the cap A screwed to the container outlet part B shown in FIG. 2 is rotated in the opening direction, both the cylindrical part 2 and the ring-shaped band part 4 gradually pivot and move toward the upper end of the container outlet part B. The ring 4 is locked by the locking plate 5 of the band portion 4 engaged with the concave portions (between the convex portions 15) below the convex portion 14 on the outer periphery of the cylindrical portion 13 of the spout B of the container. The cylindrical band part 4 does not rotate, and the cylindrical part 2 and the ring-shaped band part 4 pass through the half cut 3 between them. Are separated from one another, are those that can be detected tampering. FIG. 7 is a side sectional view showing a state in which the ring-shaped band portion 4 is separated from the cap A of the plastic stopper with an unauthorized opening preventing function shown in FIG.

  8 (a), 9 (a), and 10 (a) are side views showing various structures of a conventional general cap A used as a plastic stopper with an unauthorized opening preventing function, and FIG. 8 (b). 9 (b) and FIG. 10 (b) are top views thereof, and the cap A shown in FIG. 8 (a) is for breaking the band part 4 having the connecting part 6a at the lower part of the ring-shaped band part 4. The cap A shown in FIG. 9A is provided with a notch portion 6 for breaking the band portion 4 having a connecting portion 6a at the upper portion of the ring-shaped band portion 4, and the cap A shown in FIG. The cap A shown in FIG. 2 is provided with a notch portion 6 for breaking the band portion 4 in a half-cut form in which no connecting portion 6a is provided in any of the longitudinal directions in a part of the generatrix direction of the ring-shaped band portion 4.

  The plastic stopper with an unauthorized opening preventing function by the cap A and the spout B is, for example, a rectangular tube-shaped liquid paper container 20 (liquid packaging paper pack) as shown in the overall perspective view of FIG. The top seal portion 21 of the container 20 is indicated by an arrow by using a heat sill means such as a liquid filling packaging machine. In the filling and packaging process in which heat sealing is performed by pressing from the direction, it is necessary to prevent the heat sill means from colliding with the cap, and the size of the so-called cap A corresponding to the box-making and packaging specifications of the container body, There is a restriction on the upper limit of the height H.

  Therefore, in order to sufficiently ensure the unauthorized opening function (TE function) of the cap with the upper limit restriction of the height H of the cap A by the ring-shaped band part 4, the band width WB of the band part 4 is The objective of the fact that the band part 4 is cut off or the half-cut part 3 is cut off is set wider than the predetermined width guaranteed to the minimum limit. It is necessary to be able to recognize clearly and visually, and for that purpose, the width WR of the knurled 2b engraved on the outer peripheral surface of the cylindrical portion 2 of the cap A must be set so narrow. Therefore, the rotational torque required for breaking the band portion 4 in the opening direction of the cap A by fingers or the rotational torque required for separating the half-cut portion 3 is reduced, and the cap is reduced. When opening the plug A, there is a problem that fingers are slid on the outer peripheral surface of the cylindrical portion 2 and are difficult to open.

  Examples of the technology related to the cap A of the plastic stopper with the unauthorized opening preventing function include, for example, Japanese Utility Model Publication No. 46-24149, Japanese Utility Model Publication No. 46-24151, USP. No. No. 4,550,844, JP-A-8-48350, JP-A-8-91401, JP-A-10-218211, and the like.

  Moreover, as a technique regarding the said pull open type spout part B with a pull ring, there exist Unexamined-Japanese-Patent No. 6-24459, Japanese Utility Model Laid-Open No. 5-72755, and the like.

The known patent documents are described below.
JP-A-6-24459 Utility Kaihei 5-72755 Japanese Utility Model Publication No. 46-24149 Japanese Utility Model Publication No. 46-24151 USP. No. No. 4550844 JP-A-8-48350 JP-A-8-91401 JP-A-10-218211

  An object of the present invention is to open a cap with a tamper-evident prevention function by rotating a cap that is screwed onto a container spout and closed with a lid in the opening direction to cut off the ring-shaped band portion. In order to sufficiently ensure the unauthorized opening function by the ring-shaped band part when the half-cut part is separated and opened, the band width of the band part is larger than the predetermined width guaranteed to the minimum. Even if the width is set wider and the width of the knurled carved on the outer peripheral surface of the cap is set narrower, it is possible to solve the problem that fingers do not slide easily on the outer peripheral surface of the cap, and the outer periphery of the cap An object of the present invention is to generate a sufficient frictional force between the surface and the finger so that it can be easily opened.

  The invention according to claim 1 of the present invention includes a top plate portion 1, a cylindrical portion 2 provided with a screw portion 2 a on the inner periphery of the cylinder, and a ring at a lower end portion of the cylindrical portion 2 via a half cut portion 3. A ring-shaped band-shaped band-shaped portion 4 continuously provided in a shape, a notch or half-cut portion 6 provided in the generatrix direction of the band-shaped portion 4, and a hinge 5 a at the lower end of the inner periphery of the ring-shaped band-shaped portion 4. In the cap cap for a liquid packaging container provided with a plurality of locking plates 5 extending in a substantially horizontal direction toward the inner center of the ring of the ring-shaped band portion 4, on the outer periphery of the cylindrical portion 2 A plastic cap with a tamper-evident-preventing function, which is provided with a plurality of line-shaped protrusions 2c protruding in the busbar direction.

  The invention according to claim 2 of the present invention includes a top plate portion 1, a cylindrical portion 2 provided with a screw portion 2 a on the inner periphery of the cylinder, and an outer periphery of the cylindrical portion 2 engraved in a fine uneven line shape in the generatrix direction. Knurled 2b, a thin plate-like ring-shaped band part 4 connected in a ring shape to the lower end of the cylindrical part 2 via a half-cut part 3, and a notch provided in the generatrix direction of the band part 4 Alternatively, the half-cut portion 6 and a plurality of latches that extend in a substantially horizontal direction toward the inner center of the ring of the ring-shaped band portion 4 via a hinge 5a at the lower end of the ring inner periphery of the ring-shaped band portion 4 A cap for a liquid packaging container provided with a plate 5 is characterized in that a plurality of line-shaped protrusions 2c that protrude in the generatrix direction higher than the engraved surface of the knurl 2b are provided on the outer periphery of the cylindrical part 2. It is a plastic cap with a function to prevent unauthorized opening

The invention according to claim 3 of the present invention is the plastic cap with an unauthorized opening preventing function according to claim 1 or 2 described above, from the outer peripheral surface of the cylindrical portion 2 or the engraved top portion of the knurl 2b of the cylindrical portion 2. A height of the line-shaped protrusion 2c to the top is in the range of 0.5 mm to 3 mm.

  The invention according to claim 4 of the present invention includes a top plate portion 1, a cylindrical portion 2 provided with a screw portion 2 a on the inner periphery of the cylinder, and a ring shape at the lower end portion of the cylindrical portion 2 via a half cut portion 3. A ring-shaped ring-shaped band portion 4 that is continuously provided, a notch portion or a half-cut portion 6 provided in the generatrix direction of the band portion 4, and a ring inner band lower end of the ring-shaped band portion 4 via a hinge 5a. In the cap cap for a liquid packaging container provided with a plurality of locking plates 5 extending substantially horizontally toward the inner center of the ring-shaped band portion 4, the cylindrical portion 2 and the ring-shaped band A plastic cap cap with a tamper-evident prevention function, wherein a plurality of line-shaped protrusions 2c, 4c projecting high in the direction of the bus bar are provided on the outer periphery of each portion 4.

  The invention according to claim 5 of the present invention includes a top plate portion 1, a cylindrical portion 2 provided with a screw portion 2 a on the inner periphery of the cylinder, and an outer periphery of the cylindrical portion 2 engraved in a fine uneven line shape in the generatrix direction. Knurled 2b, a thin plate-like ring-shaped band part 4 connected in a ring shape to the lower end of the cylindrical part 2 via a half-cut part 3, and a notch provided in the generatrix direction of the band part 4 Alternatively, the half-cut portion 6 and a plurality of latches that extend in a substantially horizontal direction toward the inner center of the ring of the ring-shaped band portion 4 via a hinge 5a at the lower end of the ring inner periphery of the ring-shaped band portion 4 In the cap cap for a liquid packaging container provided with a plate 5, a plurality of line-shaped protrusions protruding in the generatrix direction higher than the engraved surface of the knurl 2 b on the outer circumferences of the cylindrical portion 2 and the ring-shaped band portion 4. Unauthorized opening characterized by providing 2c and 4c A plastic spout cap with stop function.

  The invention according to claim 6 of the present invention is the plastic cap with an unauthorized opening preventing function according to claim 4 or 5 described above, from the outer peripheral surface of the cylindrical portion 2 or the engraved top portion of the knurl 2b of the cylindrical portion 2. The height of the line-shaped protrusions 2c and 4c up to the top is in the range of 1 mm to 3 mm, respectively.

  According to the plastic cap cap with a tamper-evident prevention function of the present invention, the line-shaped protruding portion 2c that protrudes high in the direction of the generatrix of the three or more locations on the outer periphery of the cylindrical portion 2 constituting the cap body is provided. Therefore, the ring-shaped band part is broken or half-cut by grasping the cylindrical part with fingers and rotating the cap in the state where the lid is closed by screwing onto the container outlet part. When the plastic plug with the function of preventing unauthorized opening is opened, the outer peripheral surface of the cap is separated by the line-shaped protrusions 2c provided so as to protrude in the direction of the generatrix at three or more locations. A sufficient frictional force can be generated between the fingers and the fingers, and the fingers can be easily opened with a torque required for opening without the fingers sliding on the outer peripheral surface of the cap.

  Further, for example, in order to sufficiently ensure the unauthorized opening function of the plastic cap cap with the unauthorized opening prevention function by the ring-shaped band part, the band width of the band part is more than a predetermined width guaranteed to the minimum, Even in the case where the width of the outer peripheral surface of the cylindrical portion of the cap or the width of the knurled carved on the outer peripheral surface of the cylindrical portion of the cap has to be set to be narrower, the width of the outer peripheral surface of the cap The line-shaped protrusion 2c can solve the problem that it is difficult for the fingers to slide on the outer peripheral surface of the cap because the outer peripheral surface of the cylindrical portion is narrow, and there is sufficient space between the outer peripheral surface of the cap and the fingers. It can be easily opened with a frictional force.

Further, by providing the line-shaped protrusion 4c not only in the cylindrical portion 2 but also in the ring-shaped band portion 4 of the plastic cap cap with the unauthorized opening preventing function of the present invention, for example, it is screwed into the container spout portion. The cap in a state where the lid is closed is grasped with the fingers of the cap and rotated in the opening direction so that the ring-shaped band portion is cut off and opened, and then the ring-shaped band portion is separated from the cylindrical portion. Even if the cap is immediately screwed onto the container spout portion before being closed, and the cap is closed at first glance, the line-shaped protrusion 2c and the ring-shaped band portion of the cylindrical portion 2 The circumferential phase position aligned with the four line-shaped protrusions 4c is not aligned with the original position, and a deviation occurs. Therefore, it is possible to visually confirm from the appearance of the cap that the cap has been opened (opened).

  The plastic cap cap with an unauthorized opening prevention function of the present invention will be described in detail below based on the embodiments.

  As shown in the side view of FIG. 1 (a) and the side cross-sectional view of FIG. A threaded portion 2 a is provided on the inner periphery of the closed cylindrical portion 2, and a thin ring-shaped ring-shaped band portion 4 connected to the lower end portion of the cylindrical portion 2 via a half-cut portion 3 in a ring shape. It has.

  As shown in FIG. 1A, a cutout portion 6 or a half cut portion 6 for easily breaking the band portion 4 is provided in the generatrix direction of the ring-shaped band portion 4.

  As shown in the side sectional view of FIG. 5 (a) and the LL plane sectional view of FIG. 5 (b), the ring-shaped band portion 4 has a ring-like shape at the lower end on the inner periphery of the ring via a hinge 5a. A plurality of locking plates 5 extending in a substantially horizontal direction toward the ring inner center of the band portion 4 are provided.

  As shown in the side view of FIG. 1 (a) and the top view of FIG. 1 (b), the outer periphery of the cylindrical portion 2 is provided with three line-shaped protrusions 2c protruding in the busbar direction.

  As shown in the side view of FIG. 1 (a) and the side cross-sectional view of FIG. A threaded portion 2 a is provided on the inner periphery of the closed cylindrical portion 2, and a thin ring-shaped ring-shaped band portion 4 connected to the lower end portion of the cylindrical portion 2 via a half-cut portion 3 in a ring shape. It has.

  As shown in FIG. 1A, a cutout portion 6 or a half cut portion 6 for easily breaking the band portion 4 is provided in the generatrix direction of the ring-shaped band portion 4.

  As shown in the side sectional view of FIG. 5 (a) and the LL plane sectional view of FIG. 5 (b), the ring-shaped band portion 4 has a ring-like shape at the lower end on the inner periphery of the ring via a hinge 5a. A plurality of locking plates 5 extending in a substantially horizontal direction toward the ring inner center of the band portion 4 are provided.

  As shown in the side view of FIG. 1 (a) and the top view of FIG. 1 (b), a knurl 2b is engraved on the outer periphery of the cylindrical portion 2 in the form of fine uneven lines in the direction of the generatrix. On the outer periphery, there are provided three line-shaped protrusions 2c that protrude in the generatrix direction higher than the engraved surface of the knurl 2b.

  In the plastic cap with a tamper-evident preventing function of the present invention, the height of the line-shaped protrusion 2c, that is, the outer peripheral surface of the cylindrical part 2 or the engraved top of the knurl 2b of the cylindrical part 2 is Although the height to the top is not particularly limited in the present invention, for example, about 0.5 mm to 3 mm is appropriate.

The plastic cap cap with an unauthorized opening preventing function according to claim 4 of the present invention is shown in FIG.
) And a side cross-sectional view of FIG. 5A, a screw portion 2 a is provided on the inner periphery of the cylindrical portion 2 that is closed by the top plate portion 1. The lower end portion includes a thin plate-like ring-shaped band portion 4 connected in a ring shape via a half-cut portion 3.

  As shown in FIG. 1A, a cutout portion 6 or a half cut portion 6 for easily breaking the band portion 4 is provided in the generatrix direction of the ring-shaped band portion 4.

  As shown in the side sectional view of FIG. 5 (a) and the LL plane sectional view of FIG. 5 (b), the ring-shaped band portion 4 has a ring-like shape at the lower end on the inner periphery of the ring via a hinge 5a. A plurality of locking plates 5 extending in a substantially horizontal direction toward the ring inner center of the band portion 4 are provided.

  As shown in the side view of FIG. 1 (a) and the top view of FIG. 1 (b), the outer periphery of the cylindrical part 2 and the outer periphery of the ring-shaped band part 4 are each in the form of three lines protruding in the generatrix direction. Protrusions 2c and 4c are provided with the phase positions of the outer circumferences aligned.

  In the plastic cap with a tamper-evident preventing function of the present invention, the height of the line-shaped protrusions 2c and 4c, that is, the protrusion from the outer peripheral surface of the cylindrical part 2 or the engraved top of the knurl 2b of the cylindrical part 2 Although the height to the top part of 2c and 4c is not specifically limited in this invention, For example, about 0.5 mm-3 mm are suitable.

  As shown in the side view of FIG. 1 (a) and the side cross-sectional view of FIG. A threaded portion 2 a is provided on the inner periphery of the closed cylindrical portion 2, and a thin ring-shaped ring-shaped band portion 4 connected to the lower end portion of the cylindrical portion 2 via a half-cut portion 3 in a ring shape. It has.

  As shown in FIG. 1A, a cutout portion 6 or a half cut portion 6 for easily breaking the band portion 4 is provided in the generatrix direction of the ring-shaped band portion 4.

  As shown in the side sectional view of FIG. 5 (a) and the LL plane sectional view of FIG. 5 (b), the ring-shaped band portion 4 has a ring-like shape at the lower end on the inner periphery of the ring via a hinge 5a. A plurality of locking plates 5 extending in a substantially horizontal direction toward the ring inner center of the band portion 4 are provided.

  As shown in the side view of FIG. 1 (a) and the top view of FIG. 1 (b), the outer periphery of the cylindrical part 2 and the outer periphery of the ring-shaped band part 4 are each in the form of three lines protruding in the generatrix direction. Protrusions 2c and 4c are provided with the phase positions of the outer circumferences aligned.

  As shown in the side view of FIG. 1 (a) and the side cross-sectional view of FIG. A threaded portion 2 a is provided on the inner periphery of the closed cylindrical portion 2, and a thin ring-shaped ring-shaped band portion 4 connected to the lower end portion of the cylindrical portion 2 via a half-cut portion 3 in a ring shape. It has.

  As shown in FIG. 1A, a cutout portion 6 or a half cut portion 6 for easily breaking the band portion 4 is provided in the generatrix direction of the ring-shaped band portion 4.

  As shown in the side sectional view of FIG. 5 (a) and the LL plane sectional view of FIG. 5 (b), the ring-shaped band portion 4 has a ring-like shape at the lower end on the inner periphery of the ring via a hinge 5a. A plurality of locking plates 5 extending in a substantially horizontal direction toward the ring inner center of the band portion 4 are provided.

As shown in the side view of FIG. 1 (a) and the top view of FIG. 1 (b), a knurl 2b is engraved on the outer periphery of the cylindrical portion 2 in the form of fine uneven lines in the direction of the generatrix. Three line-shaped protrusions 2c are provided on the outer periphery of the cylindrical portion 2 so as to protrude higher in the busbar direction than the engraved surface of the knurl 2b, and also protrude in the busbar direction on the outer periphery of the ring-shaped band portion 4. Three line-shaped protrusions 4c are provided, and the line-shaped protrusions 2c and 4c are provided with their phase positions on the outer periphery aligned.

  FIG. 2 (a) is a side view showing another embodiment of the plastic cap cap with an unauthorized opening preventing function of the present invention, FIG. 2 (b) is a top view thereof, and on the outer periphery of the cylindrical portion 2, Four line-shaped protrusions 2c are provided, or four line-shaped protrusions 2c and 4c are arranged on the outer periphery of the cylindrical part 2 and the outer periphery of the ring-shaped band part 4, respectively. Are provided in alignment.

  FIG. 3A is a side view showing another embodiment of the plastic cap with a tamper-evident preventing function of the present invention, and FIG. 3B is a top view thereof. Are provided with five line-shaped protrusions 2c, or five line-shaped protrusions 2c and 4c on the outer periphery of the cylindrical part 2 and the outer periphery of the ring-shaped band part 4, respectively. The phase position is matched.

  As shown in the overall perspective view of FIG. 11, the plastic cap with an unauthorized opening prevention function by the plastic opening cap A with the unauthorized opening prevention function A and the spout B of the present invention is, for example, a rectangular tubular liquid paper. It is attached in alignment with a spigot attachment hole 22a provided in the upper surface plate 22 of the container 20 (liquid packaging paper pack).

  FIG. 4A is a side cross-sectional view of a plastic cap with a tamper-evident prevention function by the plastic cap cap A with a tamper-evident prevention function and a spout B in the embodiment of the present invention, and the cylindrical portion of the cap A 2 and 4c are provided with line-shaped protrusions 2c and 4c, respectively, and FIG. 4 (b) shows a plastic mouth with an unauthorized opening preventing function shown in FIG. 4 (a). The stopper is aligned with the stopper mounting hole 22a formed in the upper surface plate 22 of the rectangular tube-shaped liquid paper container 20 (liquid packaging paper pack), and is inserted into the stopper mounting hole 22a from the inner surface side of the container 20. It is a sectional side view explaining the state inserted and attached as shown in the whole perspective view of FIG.

  In addition, the spout part B is provided with a flange plate 19 on the outer periphery of the base 11 at the lower end of the cylindrical part 13 (the base 11 having an outer periphery having substantially the same diameter as the outer periphery of the cap A). The flange plate 19 is attached to the outer surface of the upper surface plate 22 in alignment with the plug attachment hole 22a formed in the upper surface plate 22 of the liquid packaging paper container 20, or as shown in FIG. In the case of internal attachment, the plug is attached by being inserted from the inner surface side of the upper surface plate 22 into a spigot attachment hole 22a formed in the upper surface plate 22 of the liquid packaging paper container 20 through the flange plate 19.

  As shown in FIG. 4 (b), the plastic cap cap A with the tamper-evident preventing function of the present invention is provided not only with the outer periphery of the cylindrical portion 2 but also with the line-shaped protrusion 4c on the outer periphery of the ring-shaped band portion 4. When the cap is inserted from the cap A side into the cap attachment hole 22a in which the cap A is formed in the upper plate 22 of the liquid paper container 20 (liquid packaging paper pack), the upper plate The inner peripheral edge of the attachment hole 22 a of the ring 22 is engaged between the line-shaped protrusion 4 c on the outer periphery of the ring-shaped band portion 4 and the flange portion 19 of the spout B, so that the plug is the upper surface plate 22 of the container 20. Is temporarily fixed in the mounting hole 22a.

Therefore, the line-shaped protrusion 4c on the outer periphery of the ring-shaped band 4 is formed on the inner surface (thermoplastic resin layer surface) of the upper surface plate 22 of the container 20 with the upper surface of the flange portion 19 of the plastic spout B serving as an ultrasonic heating means. It has a temporary locking action when the plug is attached to the container 20 by heating and fusing, so that the fusing and attaching process of the plug can be performed smoothly, and the cylindrical portion of the spout B is conventional. 13 Omitted without providing a stopper rib (protrusion part, provisional set rib) for temporarily fixing the stopper provided at a position facing the flange part 19 on the outer periphery of the base part 11 at the lower end to the attachment hole 22a of the container 20. Therefore, in the CAD design or the like in the plastic molding of the spout B, the outer diameter of the base 11 at the lower end of the cylindrical portion 13 can be set large with a margin.

(A) is a side view of the plastic cap cap with an unauthorized opening prevention function of the present invention, (b) is a top view thereof. (A) is a side view of the plastic cap cap with an unauthorized opening prevention function of the present invention, (b) is a top view thereof. (A) is a side view of the plastic cap cap with an unauthorized opening prevention function of the present invention, (b) is a top view thereof. (A) is a sectional side view of the plastic cap cap with an unauthorized opening prevention function of the present invention, (b) is an upper surface plate of a liquid packaging paper container (paper pack) with the plastic opening cap with an unauthorized opening prevention function of the present invention. Side sectional drawing explaining the state attached to the. (A) is a sectional side view of a general plastic stopper with a tamper-evident prevention function, and (b) is an LL plane sectional view thereof. (A) is a sectional side view of a general plastic stopper with a tamper-evident prevention function, and (b) is an LL plane sectional view thereof. A side sectional view in the state where a general plastic cap with a tamper-evident prevention function was opened and a ring-shaped band part was cut off from a cap via a half cut 3. (A) is a side view of a general plastic cap with a tamper-evident prevention function, and (b) is a top view thereof. (A) is a side view of a general plastic cap with a tamper-evident prevention function, and (b) is a top view thereof. (A) is a side view of a general plastic cap with a tamper-evident prevention function, and (b) is a top view thereof. The external perspective view of the container (paper pack) made from a liquid packaging paper which attached the plastic cap with a general unauthorized opening prevention function.

Explanation of symbols

A ... Cap B ... Outlet part 1 ... Top plate part
DESCRIPTION OF SYMBOLS 2 ... Cylindrical part 2a ... Screw part 2b ... Knurl 2c ... Line-shaped projection part 3 ... Half cut part 4 ... Ring-shaped band part 4c ... Line-shaped projection part 5 ... Locking plate 5a ... Hinge part 5b ... Locking plate front-end | tip part 6 ... Notch (or half cut)
6a ... Connecting part 20 ... Container 21 ... Top seal part 22 ... Top plate 22a ... Plug attachment hole H ... Plug height WB ... Width of ring-shaped band part WR ... Knurling width

Claims (6)

  A top plate portion 1, a cylindrical portion 2 provided with a screw portion 2 a on the inner periphery of the cylinder, and a thin ring-shaped ring band continuously provided in a ring shape via a half-cut portion 3 at the lower end portion of the cylindrical portion 2 Part 4, a cut-out part or half-cut part 6 provided in the generatrix direction of the band part 4, and a ring inner side of the ring-shaped band part 4 via a hinge 5 a at the ring inner peripheral lower end of the ring-shaped band part 4 In a cap for a liquid packaging container provided with a plurality of locking plates 5 extending in a substantially horizontal direction toward the center, a plurality of line-shaped protrusions 2c projecting in the generatrix direction on the outer periphery of the cylindrical part 2 A plastic cap with a tamper-evident prevention function, characterized in that it is provided.   The top plate portion 1, the cylindrical portion 2 provided with a screw portion 2 a on the inner periphery of the cylinder, the knurled 2 b engraved in the shape of fine irregularities in the generatrix direction on the outer periphery of the cylindrical portion 2, A thin plate-like ring-shaped band portion 4 provided in a ring shape at the lower end via a half-cut portion 3, a notch portion or a half-cut portion 6 provided in the direction of the generatrix of the band portion 4, and the ring-shaped band A mouth for a liquid packaging container provided with a plurality of locking plates 5 extending in a substantially horizontal direction toward the inner center of the ring of the ring-shaped band part 4 via a hinge 5a at the lower inner peripheral edge of the part 4 In the stopper cap, a plastic cap with a tamper-evident-preventing function, wherein a plurality of line-shaped protrusions 2c projecting in the generatrix direction higher than the engraved surface of the knurl 2b are provided on the outer periphery of the cylindrical portion 2.   The height from the outer peripheral surface of the cylindrical part 2 or the engraved top of the knurl 2b of the cylindrical part 2 to the top of the line-shaped protrusion 2c is in the range of 0.5 mm to 3 mm. Or the plastic cap cap with an unauthorized opening prevention function of 2 description.   A top plate portion 1, a cylindrical portion 2 provided with a screw portion 2 a on the inner periphery of the cylinder, and a thin ring-shaped ring band continuously provided in a ring shape via a half-cut portion 3 at the lower end portion of the cylindrical portion 2 Part 4, a cut-out part or half-cut part 6 provided in the generatrix direction of the band part 4, and a ring inner side of the ring-shaped band part 4 via a hinge 5 a at the ring inner peripheral lower end of the ring-shaped band part 4 In a cap cap for a liquid packaging container provided with a plurality of locking plates 5 extending in a substantially horizontal direction toward the center, it protrudes high in the direction of the bus in the outer periphery of each of the cylindrical portion 2 and the ring-shaped band portion 4. A plastic cap with a tamper-evident prevention function, wherein a plurality of line-shaped protrusions 2c, 4c are provided.   The top plate portion 1, the cylindrical portion 2 provided with a screw portion 2 a on the inner periphery of the cylinder, the knurled 2 b engraved in the shape of fine irregularities in the generatrix direction on the outer periphery of the cylindrical portion 2, A thin plate-like ring-shaped band portion 4 provided in a ring shape at the lower end via a half-cut portion 3, a notch portion or a half-cut portion 6 provided in the direction of the generatrix of the band portion 4, and the ring-shaped band A mouth for a liquid packaging container provided with a plurality of locking plates 5 extending in a substantially horizontal direction toward the inner center of the ring of the ring-shaped band part 4 via a hinge 5a at the lower inner peripheral edge of the part 4 The stopper cap is characterized in that a plurality of line-shaped protrusions 2c and 4c projecting in the generatrix direction higher than the engraved surface of the knurl 2b are provided on the outer circumferences of the cylindrical portion 2 and the ring-shaped band portion 4, respectively. Plastic cap with tamper-evident function -Up.   The height from the outer peripheral surface of the cylindrical part 2 or the engraved top part of the knurl 2b of the cylindrical part 2 to the top part of the line-shaped protrusions 2c, 4c is in the range of 0.5 mm to 3 mm, respectively. The plastic cap cap with an unauthorized opening prevention function according to claim 4 or 5.

Images